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Cited by 23Ruminant Nutrition and Digestive PhysiologyCrop Yield and Soil FertilityAgricultural Engineering and Mechanization

Effect of Recutting and Plant Maturity on Kernel Passage and Feeding Value of Corn Silage

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Buck, G.R., Merrill, W.G., Coppock, C.E., Slack, S.T.·1969·Journal of Dairy Science
DOI 10.3168/jds.s0022-0302(69)86803-7
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Abstract

In each of two trims, ]6 Holstein firstlactation cows were assigned to a Latinsquare design for four, five-week feeding periods to compare the intake and milk production response when fed corn silages involving various plant maturities, as reflected by the following values for silage dry matter content and fineness of chopping--Trial I: 22%; 30%; 34% recut 5 era; and 46%, recur 5 cm, and Trial II: 33%; 33%, reeut 5 cm and 2.5 cm; 40%; and 38%, recur 2.5 cm.With silages of higher dry matter content, less silage (as-fed basis) was consumed, but more dry matter was consumed per 100 kg of body weight.Recutting had no significant effect on silage dry matter intake.All silage treatments within trials supported milk production equally well.Steers were used to determine the digestibility of each silage, and kernel passage was determined.Plant maturity had no significant effect on total digestible nutrient or digestible energy of the dry matter of the silages.Recutting the plant before ensiling reduced the amount of kernel dry matter in the feces, but recutting had no significant effect on the total digestible nutrients or digestible energy values of the silages.

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  • Variation in maturity at ensiling affects silage DMI, milk yield and milk composition of dairy cows.

    “affecting silage DMI, milk yield and milk composition of dairy cows.16 -21”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [16]

    The Conclusion reports that increasing plant maturity raised silage dry-matter intake up to about 35% DM, and the Results report differences in milk fat percentage for some treatments. But the Conclusion says maturity had little effect on milk production, while the Results report no significant difference in actual milk yield. The claim therefore overstates the milk-yield finding. (LLM, conf=0.89)

    Experimental — accuracy not yet measured

  • In Europe and other parts of the world, silage maize is harvested at whole-crop DM content ranging from 250 to 450 g/kg fresh weight.

    “silage maize is harvested at a wide range of maturities, with the whole-crop DM content ranging from 250 to 450 g kg -1 fresh weight.”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [16]

    Table 3 (page not provided) lists experimental corn silages from 22% to 46% dry matter, supporting the point that silage can be harvested at widely varying maturities. It does not establish 25%–45% as a general harvesting range in Europe or elsewhere. The Conclusion instead recommends 30%–35% dry matter as the desired harvest range. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

  • Starch in ensiled maize grains is almost completely digested at end of digestive tract.

    “The starch in ensiled maize grains is almost completely digested at the end of the digestive tract.16,29,35 -38”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [16]

    The Digestibility Studies section says the paper measured “available carbohydrate,” an assay comprising principally soluble sugars and starches, rather than starch in maize grains separately. Table 3 (labelled Conclusion in our copy; page unavailable) reports 6.2–16.3% indigestibility of available carbohydrate, supporting substantial digestion by the time feces were collected, but not the more specific claim that grain starch was almost completely digested. (LLM, conf=0.86)

    Experimental — accuracy not yet measured

  • Based on the reviewed dataset, differences in milk yield R2 = 0.599 and protein content R2 = 0.605 were strongly related to changes in the starch/NDF ratio during maturation of the maize.

    “Based on the reviewed dataset, 2,6,16,20,21,35 the differences in milk yield (R 2 = 0.599; Fig. 5a) and protein content (R 2 = 0.605; Fig. 5b) were strongly related to changes in the starch/NDF ratio during maturation of the maize.”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [16]

    The Results report milk-production measurements across corn-silage treatments, so this paper could contribute milk-yield data to the citing authors’ reviewed dataset. But the paper does not report a starch/NDF relationship, protein-content relationship, or either R² value. Its Conclusion instead says plant maturity had little effect on milk production; the reported correlations appear to be the citing authors’ pooled analysis, not findings established by this source alone. (LLM, conf=0.82)

    Experimental — accuracy not yet measured

  • Variation in maturity at ensiling during grain filling results in major changes in content and composition of carbohydrates (starch/NDF ratio) in maize silages.

    “The variation in maturity at ensiling during the grain filling period results in major changes in the content and composition of the carbohydrates (starch/neutral detergent fibre (NDF) ratio) in maize silages”

    From Nutritive value of maize silage in relation to dairy cow performance and milk quality (2015) · cites this paper as [16]

    The Abstract describes corn silages harvested at different plant maturities, and Digestibility Studies describes measuring available carbohydrate, principally sugars and starches. But the passages found do not report that maturity caused major changes in carbohydrate composition or in the starch/NDF ratio; searches for starch, NDF, and maturity-related composition changes did not establish that point. (LLM, conf=0.72)

    Experimental — accuracy not yet measured

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Cites

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1 of the 9 references couldn’t be matched to a known paper.

Research works printed but not linked: 2

  1. [3]3. Buck, G. R. 1968. Effect of plant maturity and particle size on the feeding value of corn silage. M.S. thesis, Cornell University, Ithaca, New York.
  2. [11]11. Kjelgaard, W. L., J. W. Bratzler, and J. R. Graham. 1966. Nutritive value of corn silage not improved by extra processing. Science for the Farmer, 13(4) : 8.

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Related

Authors
Buck, G. R., Merrill, W. G., Coppock, C. E., & Slack, S. T.
Affiliations
Cornell University (US)
Venue
Journal of Dairy Science
Publisher
American Dairy Science Association
Published
1969-10
Volume
52
Issue
10
Pages
1617-1623
ISSN
0022-0302 (ISSN-L)
DOI
10.3168/jds.s0022-0302(69)86803-7
OpenAlex
W1965686920
Semantic Scholar
76ea8e630683bbb84cf90375e4ce12f52a1d330d
Cited by
23
References
9
Citations by year
2021: 1 · 2020: 1 · 2014: 1
FWCI
1.08
Type
journal article
Language
en
Open access
Licence
Locations
Journal of Dairy Science (publishedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Crop Yield and Soil Fertility
  • Physical Sciences › Engineering › Mechanical Engineering › Agricultural Engineering and Mechanization
Keywords
corn silage, plant maturity, feed value, dry matter intake, milk production, Holstein cows, steers, digestible nutrients, digestible energy

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